captinjohn

I usally get a glow engine primed and to the kicking stage...then with a heavy leather glove boucnce start it by pulling prop backwards and let prop go when I feel it kick and it will start forwards. That is most the time!!! Works real slick. A leather firemans glove is what you want. Capt,n

KI8FR

Gas/glow Rocks....

My carb was fine. The line in my tank came off. lol... I fixed it and have it a 2 flips and off she went.... Got it all tuned in, and she ran grate.. no probs at all... It had a very low idle. I do not have a tack but I can not give you # at this point.. but it was slow.. so slow that I had the idle screwed out all the way before it would quit... Love it.. I wish I did this years ago
Paul

Ralphbf

My Feedback: (27)

Glad to hear it Paul.

It sounds so simple that it can't be real, let a lone easy, but it is.

How about the extra oil? Did you notice any thing?
Did you run it long enough to get the motor good and warm?
Do you think the nitro level was okay?

When you get the 10/10 for it, it will actually be running a little richer.
But I don't think there will be much of an adjustment, if any.

KI8FR

The oil was hi.. so it was a little meessy.. as far as the 15% I did not give it time to get hot or mess the engine up I let it idle for a long time and ran the engine at 1/2 to 3/4 for some time but I did not run it at full. I will do that when I get me some 10% fuel. I do not know it the 15% will hurt it or not. but I am not going to mess it up..

I was running a 16X8 prop on this 25cc. that is what I ran not it when it was just gas, Is that the same prop to run for the rocking gas/glow?

Ralphbf

My Feedback: (27)

16x8 is a good starting place.
You will need a tach to see if it's sized right.

But you will have a little more power to go along with your better idle.

av8tor1977

My Feedback: (6)

The same prop should be fine. On 25cc engines I like an APC 16 x 8 for an aerobatic airplane, and an 18 x 6 for a larger, slower scale airplane like my Fokker Triplane.

AV8TOR

RysiuM

My Feedback: (1)

For test on Poulan 25 I used MA 16x8 Classic - it is much easier on hands when kicks back as it doesn't cut the lether glow As I remember for the best vertical I tested different props and the best luck was with APC 17x6. So unles I start opening ports it looks like it is the reasonable load.

cfaw10

finally got my 33 running on gas/glow this morning. It has a great top end, a low idle, but no transition. In fact, to get any immediate transition at all, I have to run the low needle ridiculously rich (about 4 rounds). Then it loads up at idle. It's a walbro carb, and it transitioned well on gas/oil at around 2 rounds out. Any suggestions?

Ralphbf

My Feedback: (27)

There is an adjustment to the regulator that will richen up the mixture and allow you to
run the needles closer in.

I have never had to do this, I just know about it.

I know someone will fill you in.

Ralph

cfaw10

has anyone else had any problems with transition after going to gas/glow? BTW, the high speed needle didn't take much tweaking at all.

av8tor1977

My Feedback: (6)

I notice that when switching to Gas/Glow that the engine seems to like the idle a bit richer than normal, but I have no transition problems with any of mine.

AV8TOR

jpr72c

My Feedback: (1)

What about the Poulan chainsaws on gas/glo? Do they have a bolt-on carb and what about a prop adapter?

Thanks for the info. and all the work in perfecting gas/glo.

av8tor1977

My Feedback: (6)

I have a Poulan 42cc chainsaw engine I'm running on Gas/Glow. Does fine. The 42cc has a bolt on carb. The 46cc is more commonly converted, but it needs a carb adapter built. There have been various solutions explored/invented here in the forum. Do a search and you should come up with the info, and a prop adapter.

Have fun,
AV8TOR

RysiuM

My Feedback: (1)

I bought that chainsaw (Poulan 42) just for converting the engine. But once I started to disassemble it, I saw what nice piece of equipment is that and I told myself, it would be a shame do distroy perfecly good saw. This way I don't have the engine, but I have very nice chainsaw.
Then I thought about buying the next one just for conversion, but I know, that the time I will start getting out the first screw, the history will repeat. Shame on me.

However I run this chainsaw on gas-glow fuel and glow plug. It run just fine, just slow and started to smoke, untill I realized, I locked the chain brake[8D]. I released the brake, and the engine run without any problems on transition - like a chainsaw should.

captinjohn

My friend tell me funny story. He said....man bught new chainsaw. His neibor went over to see how it cut tree. Guy said, this new chainsaw...dona cut any faster than my hand saw. Boy after watching how you cut with saw..no wonder...you gotta start engine first!!!!

KI8FR

What is the smallest engine that you have seen gas/glow? what so you all think about a .60 to .90 gas glow? And if so what do you think the benfits are?

Paul

RysiuM

My Feedback: (1)

Here it goes - results with increased compression. It is still not the best what it should be because my glow adapter started to leak (I've seen bubbles coming from the glow plug), but this time starting by hand was possible (not by two flips tho). It was easier when engine was hot - go figure

Now here are the numbers. Full throttle after fiddling with needle established at 7200 rpm. I got idle at 1900 rpm, but the engine was not running steady (missing sometimes) and obviously was loading on too rich mixture. All these went away when I applied power to the glow plug. With glow plug powered I got steady ticking at 1700 rpm. I guess I need more methanol or beter idle mixture setup.

Transition was the same as on gas. It means when from idle I slammed WOT the did not jump to rpm at once, but needed to take few deep breaths (5 rotations or so). But the good news is it never died on it. When glow plug was powered on idle, the hesitation was almost not noticable.

I was planning to try fuel with only 10% methanol, but it looks like I need more methanol than that. First I will need to make sure the plug is not leaking and the mixture is tuned right.

av8tor1977

My Feedback: (6)

KI8FR

Here is a picture of my Super Tiger .90 on Gas/Glow. It runs great! But it has been modified with roller bearings on the rod so that it can run on the low oil content. That's the trick with the smaller engines; without mods they can't run low oil mixes.

AV8TOR

cfaw10

AV8TOR---

what size carb is that on the .90, and did you use a needle bearing directly on the crankpin or a bearing with an internal race? That looks like a good engine for my next project.

aero nut

you can run a glow engine with the gas/glow fuel mix at a 10% oil content, the only backdraw is that the glow engine carb is very sensitive to adjustment other than that it will run great!!!!

av8tor1977

My Feedback: (6)

Mine is one of the BME modified Super Tiger .90 engines, so I don't know what all he does inside. (I didn't take it apart.) I know you can't run a needle bearing directly on the crankpin though, as it isn't hard enough.

It's an 11mm Walbro carb on it. It came with a Zama, but I had trouble with two different diaphragms in the Zama swelling up in the Gas/Glow fuel. I've never encountered this with the various types of Walbro diaphragms. So I switched to a Walbro carb and no more problems.

The Walbros are physically slightly larger however, and I had to do a little grinding here and there to get it to fit. Runs great on Gas/Glow. 11,700 rpms on a 13 x 6. I put it on my Twist 60 and it's a rocket!!

AV8TOR

cfaw10

Well, I ran 2 tanks of fuel through it this morning. Adjusted the needles and the float lever. Still no change in the transition. I does fairly well with the power on the glow plug, but I don't think it'll be worth using an idle bar. I'm about to run out of both ideas and inspiration. Just for kicks, I switched it back to gas/oil to see if there was a problem with the carb. After a few adjustments on the needles, it ran good as ever. Goes from 2000 rpm to WOT with no hesitation at all. Think I'll leave it alone unless someone has any other suggestions.

Ralphbf

My Feedback: (27)

What glow plug are you using?

cfaw10

O.S. type F 4 stroke plug

Ralphbf

My Feedback: (27)

That's the right one, have you tried a new one?